VESTEL 11AK19, Руководство по обслуживанию, Страница: 5 / 40

3. TUNER
Either a PLL or a VST tuner is used as a tuner.
UV1316 (VHF/UHF) is used as a PLL tuner. For only PALM/N, NTSC M applications UV 1336 is used as the PLL tuner. UV 1 3 1 5 (VHF/
UHF) is used as a VST Tuner.
Channel coverage of UV1316:
BAND
Low Band
Mid Band
High Band
OFF-AIR CHANNELS
CHANNELS
RANGE (MHz)
E2toC
E 5 t o E 1 2
E21 to E69
FREQUENCY
48.25 to 82.25 (1)
175.25 to 224.25
471.25 to 855.25 (2)
CABLE CHANNELS
CHANNELS
S01 to S08
S09 to S3 8
S39toS41
FREQUENCY
RANGE (MHz)
69.25 to 154.25
161.25to439.25
447.25 to 463.25
(1). Enough margin is available to tune down to 45.25 MHz.
(2). Enough margin is available to tune up to 863.25 MHz.
Noise Typical Max.
Low band : 5dB 9dB
Mid band : 5dB 9dB
High band : 6dB 9dB
Channel Coverage UV1336:
Gain Min.
All channels : 38dB
Gain Taper (of-air channels) : -
Typical
44dB Max.
52dB
8dB
BAND
Low Band
Mid Band
High Band
CHANNELS
2 t o D
EtoPP
QQ to 69
FREQUENCY
RANGE (MHz)
55.25to139.25
145.25to391.25
397.25to801.25
Noise is typically 6dB for all channels. Gain is minimum 38dB and maximum 50dB for all channels.
Channel Coverage of UV1315:
BAND
Low Band
Mid Band
High Band
OFF-AIR CHANNELS
CHANNELS
E2toC
E5 to E12
E21 to E69
FREQUENCY
RANGE (MHz)
48.25(082.25(1)
175.25to224.25
471.25 to 855.25 (2)
CABLE CHANNELS
CHANNELS
S01 to S10
S11 toS39
S40 to S41
FREQUENCY
RANGE (MHz)
69.25 to 168.25
231.25to447.25
455.25 to 463.25
(1). Enough margin is available to tune down to 45.25 MHz.
(2). Enough margin is available to tune up to 863.25 MHz.
Noise
Low band
Mid band
High band Typ.
:6dB
:6dB
:6dB
Max.
9dB
10dB
11dB
Gain
All Channels
Gain Taper
(off-air channels)
Min.
38dB
•
Typ.
44dB
•
Max.
50dB
8dB
4. VIDEO SWITCH TEA6415C
In case of three or more external sources are used, the video switch 1C TEA6415C is used. The main function of this device is to switch
8 video input sources on the 6 outputs.
Each output can be switched on only one of each input. On each input an alignment of the lowest level of the signal is made (bottom
of sync. top for CVBS or black level for RGB signals).
Each nominal gain between any input and output is 6.5dB.For D2MAC or Chroma signal the alignment is switched off by forcing, with
an external resistor bridge, 5VDC on the input. Each input can be used as a normal input or as a MAC or Chroma input (with external
resistor bridge). All the switching possibilities are changed through the BUS.
Driving 75ohm load needs an external resistor.
It is possible to have the same input connected to several outputs.
5. AM DEMODULATOR TDA9830
The TDA9830 is designed for AM-sound demodulation used in L and L" standard.